Asp.net中编程方式调用ashx(通过webRequest)

请看代码：

    public sealed string GetGscCurrentUser()

    {

        HttpWebRequest webRequest = null;

        StreamReader responseReader = null;

        try

        {

            //ashx Url

            string getGscUserUrl = "http:/xxx.com/GscHandler.ashx";

            //加入参数，用于更新请求

            string urlHandler = getGscUserUrl + "?id=" + Guid.NewGuid();            

            webRequest = (HttpWebRequest)HttpWebRequest.Create(urlHandler);

            webRequest.Timeout = 3000;//3秒超时

            //调用ashx，并取值

            responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());

            string currentUserGulid = responseReader.ReadToEnd();

            return currentUserGulid.Trim();

        }

        catch

        {

            return "";

        }

        finally

        {

            responseReader.Close();

            responseReader.Dispose();

        }

    }

 需要授权时写法如下：

        public string GetGscCurrentUser()
        {
            HttpWebRequest webRequest = null;
            StreamReader responseReader = null;
            try
            {
                string getGscUserUrl = System.Configuration.ConfigurationManager.AppSettings["GscGetUserUrl"];
                string urlHandler = getGscUserUrl + "?id=" + Guid.NewGuid();
                webRequest = (HttpWebRequest)HttpWebRequest.Create(urlHandler);
                webRequest.Timeout = 3000;//3秒超时
                webRequest.PreAuthenticate = true;
                NetworkCredential gscCred = new NetworkCredential("account", "***");
                webRequest.Credentials = gscCred;
                responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
                string currentUserGulid = responseReader.ReadToEnd();
                return currentUserGulid.Trim();
            }
            catch
            {
                return "";
            }
            finally
            {
                responseReader.Close();
                responseReader.Dispose();
            }
        }